US 6,656,629 B1Granted

High rate electrochemical cell

AssigneeEveready Battery Company, Inc.

InventorDale R. Getz

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Abstract

An electrochemical cell construction having a large anode-to-cathode interfacial surface area to realize improved high rate service performance in an easy-to-manufacture construction. A first electrode, such as the cathode, is formed having a conductive current collector integrally embedded therein. Separator material is disposed on both the inner and outer cylindrical walls of the first electrode. An outer electrochemically active material covers the outer separator material outside of the first electrode and an outer insulation is layered on top of the outer electrochemically active material to form a cathode bobbin. The cathode bobbin is disposed into a container having a closed bottom end and an open top end. A second electrode, such as an anode, is disposed in the inner cylindrical volume formed in the first electrode and a conductive path is provided between the outer electrochemically active material and the second electrode. A current collector is disposed in contact with the second electrode, and a cover assembly is assembled to the open end of the container.

Claims6

Dependent claims

A high rate electrochemical cell comprising:

a container having a closed bottom end and an open top end;
a cathode disposed in said container and having a positive polarity;
an anode disposed in said container on one side of said cathode, said anode having an electrochemically active powder and a negative polarity;
a positive current collector in contact with said cathode;
an outer electrochemically active layer having said negative polarity and disposed on another side of said cathode, wherein said outer electrochemically active layer consists of a foil;
a separator disposed between said cathode and said anode, said separator further disposed between said cathode and said outer electrochemically active layer, wherein the foil is wrapped around said separator;
a negative current collector connected in contact with said anode;
an electrical connector connecting said outer electrochemically active layer to at least one of said anode and said negative current collector;
a dielectric layer disposed between said outer electrochemically active layer and said container;
and
a cover assembly assembled to said open top end of said container.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/915,852Filed 26 Jul 2001 · continuation
Priority: 24 Nov 1998
Granted: 2 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01M 6/103
With wound or folded electrodes: cells with electrode of only one polarity being folded or wound
H01M 4/72
Characterised by shape or form: grids
H01M 6/08
Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid: with cup-shaped electrodes
H01M 6/10
Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid: with wound or folded electrodes